Dormer A777 HSCo Heavy-Duty 8.5mm Jobber Drill Bit
Professional cobalt steel drill bit with aerospace-grade 135° split point for high-tensile materials. 117mm length, 75mm working length.
The Dormer A777 HSCo Heavy-Duty 8.5mm Jobber Drill Bit is engineered for high-performance drilling in tough materials. Featuring a 135° split point design, specifically developed to handle greater heat generation during drilling, this drill bit excels when working with higher tensile materials, making it particularly suitable for the aerospace industry.
Key Features
- Cobalt steel (HSCo) construction for exceptional strength and heat resistance
- Bronze surface treatment provides increased durability and corrosion resistance
- Heavy-duty split point reduces walking and provides more efficient material penetration
- Complies with aerospace specification NAS 907 type P3 point standards
Drill Geometry by Size Range
- 0.30mm - 0.95mm: 118° conical point
- 1.00mm - 1.40mm: 135° 4-facet point
- 1.50mm and above: 135° split point (aerospace specification compliant)
This premium-quality drill bit meets DIN 338 RN, BS328, and ISO 235 standards, ensuring professional-grade performance. The precision-ground right hand spiral flute with thick web design provides improved rigidity and chip evacuation for clean, accurate drilling operations.
Dimensions
- Overall length: 117mm
- Working length: 75mm
- Tip diameter: 5.80mm
- High-tensile materials drilling
- Aerospace industry applications
- Precision metalworking
- Industrial manufacturing
- Material: HSCo Cobalt steel
- Surface Treatment: Bronze
- Point Type: 135° Split Point (NAS 907 P3 standard for 1.5mm+)
- Point Angle Variations: 118° (0.3-0.95mm), 135° 4-facet (1.0-1.4mm), 135° split point (1.5mm+)
- Flute Geometry: Right hand spiral, Standard Helix, Thick Web
- Standards: DIN 338 RN / BS328 / ISO 235
- Tip Diameter: 5.80mm
- Working Length: 75mm
- Overall Length: 117mm
- Weight: 38g
Free standard delivery on UK mainland orders. Express delivery options and international shipping available at checkout.
We offer a 30-day money-back guarantee on most products. For faulty items, contact us within 14 days for a replacement or refund.
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